EBK HUMAN BIOLOGY
EBK HUMAN BIOLOGY
11th Edition
ISBN: 9780100545939
Author: MCMILLAN
Publisher: YUZU
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Chapter 19, Problem 10CT

Bill and Marie each have flat feet, long eyelashes, and “achoo syndrome” (chronic sneezing). All are dominant traits. The genes for these traits each have two alleles, which we can designate as follows:

Chapter 19, Problem 10CT, Bill and Marie each have flat feet, long eyelashes, and achoo syndrome (chronic sneezing). All are

Bill is heterozygous for each trait. Marie is homozygous for all of them. What is Bill's genotype? What is Marie’s genotype? If they have four children, what is the probability that each child will have the same phenotype as the parents? What is the probability that a child will have short lashes, high arches, and no achoo syndrome?

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Mary and Dai both have freckles (a dominant trait). Their first child, Mariko, does not have freckles. Show using a Punnett square show how this is possible. If they have two more children who DO freckles (making for one without and two with) what is the probability that the NEXT child will NOT have freckles?
Hemophilia is a sex-linked recessive trait. A male hemophiliac and phenotypically normal female have a son with hemophilia.  They would like to have one more child. What is the probability of having a child without hemophilia? Explain using a Punnett square.   Is it possible for a girl to be born with hemophilia? Explain.
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